foreground onMessage not triggered on Chrome Extension popup.html

### [REQUIRED] Describe your environment

* Operating System version: macOS 12.0.1
* Browser version: Chrome 96
* Firebase SDK version: 9.6.1
* Firebase Product: cloud messaging

### [REQUIRED] Describe the problem

These lines ignore all chrome extension, however, popup.html doesn't fit this situation.

It would be great to add something like this: `client.url.startsWith('chrome-extension://') && client.url.includes('popup.html')`

https://github.com/firebase/firebase-js-sdk/blob/3d8109ca30eb0433f5d0f32aad9a0360785f293c/packages/messaging/src/listeners/sw-listeners.ts#L214-L222